Which of the following is categorized under extras on the menu?

The choice of green chilies as the correct answer is based on the way menu items are categorized at Jack in the Box. Extras typically include items that enhance or complement a meal but are not the main food items themselves. Green chilies serve as a condiment or addition that can be added to various dishes to enhance flavor, aligning with the idea of extras.

On the other hand, soda is usually classified as a beverage, while both onion rings and fish tacos are considered stand-alone menu items rather than extras. Onion rings can be a side item but are not categorized as extras since they are a distinctive food choice, and fish tacos represent a full meal option.